I''m trying to use inline assembly in a C program to take 4 C float variables, load them into a XMM register, multiply them by some value then put them back into the variables. I have the processor pack update for visual c++ so the instructions are supported, I just need to know how to properly do this. I think I use MOVAPS to load them into the XMM register and then MULPS to multiple the values in parallel. ? If anyone can show me how to do this or direct me to an article I would appreciate it thanks, Mike